Use the reading list plugin to create your own column that replicates the "on device" column.
Code:
List Name: On Tablet
List Type: Auto populate from books on device
Device to sync this list to: <your tablet> OR *Any Device
When changing this list: update column for add or remove
Column to update: <your new custom column>
Value in column to add/remove: Y
Custom Column:
Lookup name: <your new custom column
Column heading: On Tablet
Colun type: Yes/No